Improved kook-deill



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TO ALL WHOM IT MAY CONCERN:

Be it known that I, WILLIAM WEAVER, of Phoenixville, Chester county,Pennsylvania, have invented an Improved Rock-Drilling Machine; and I dohereby declare the following to be a'full, clear, and exact descriptionof the same. Y

My invention/consists .of certain mechanism, constructed and operated asfully described hereafter, for drilling holes in crooks. 4 l l Inorderto enable others skilled in the art to Vmake and use my invention,I willnow proceed to describe its construction and opration, referencebeing had to the accompanying drawing, which formsa -part of thisspecification, and in which- I Figure 1 i's a front elevation of myimproved rock-drilling machine.

Figure?, a sectional elevation.

Figure 3, a detached view of part of the machine; and I l j Eigures 4 to7 inclusive, perspectiveviews showing the operation of parts of themachine.

Ais` a platform, to projections 1'1 at the edges of whichvare hingedlegs B B, and 4a frame, C, the latter consisting of two parallel sidestrips a al, connected'at the opposite ends by cross-pieces b b. Theframe C and legs B swing. freely on the pins by which they are jointedto the projections 1, and each may be secured, after adjustment, by aset-screw, c, which passes through a curved slot in the projection 1into the adjacent leg-or frame. A bar, a2, is so connected to4 each leg,and to eachl ofthe strips a'a, Vthat it may be adjusted on the leg orstrip, a set-screw,` 2, which passes into' the leg or strip .through aslot` in the bar, serving to secure the latter in its position afteradjustment. Through the cross-piece I1 passes a tube, d, into alongitudinal recess, in which projects a pin, 10, in the cross-piece, sothat while the tube may slide freely in the 'cross-piece, it cannotturn' in the same, and through this tube, and through the cross-piece'15', passes a rod, D, on a screw-thread, in the centreof which t-urns anut, N. In the rod. D, ,below the screw-thread on the same, is a groove,Xe, and in the cross-piece turns a screi v,'3, the point of'whichisadapted to the groove e. The nut N consists vof two disks, w

ff', and nn'intervening washer, 4, of rubber or its equivalent, aset-screw, 8, which passes through the upper disk into one of a numberof openings, 9, in thelowerdislr, preventing the disks after adjustmentfrom turning independently of each other. To the lower end of the rodDis secured Aa rock-drill, D., and to the frame C is secured anadjustable tube, E, for containing `waterythe said Vtube 4being benttowards the drill at its lowerend, and furnished with a suitable faucet.At thelower edge of the nut Nare a number of'teeth or projections, t',which are inclined on one side` and straight ou the other, as shown inthe drawing.. At' the lower end'of the tube d is a flange, s, and roundthe tube is coiled a spring, c, the latter being conned between theflange w and a plate, Z, which is adjustable on rods 7 7, projecting`from the under side of the cross-piece b. In bearings secured tothe sidestrip a turns a shaft, I, on which are twol cog-wheels or p inions, Jand K, the latter being adapted to the teeth or projections on the diskf. plate, t, which is secured to the inner side of the strip a,

projects a short distance aboveV the pinions K for a purposedescribed-hereafter. From the rear side of the frame C project two arms,P P, in each of which are two openings@ o, adapted for thereception-of ashaft, L, and to the latter is secured a cog-wheel, M, the teeth ofwhich are adapted to those of the pinion J. From the shaft L projectthree arms, s s s. eachjof which is curved at the outer end and bent toone side as shown in the drawing. i I

The parts'of the machine being inthe position shown in'g. 1, (the pointVof the drill being embedded inthe rock,) a rotary motion in thedirection of its arrow is imparted to the shaft I, when the operation ofthe machine will be asfollows: The straight portion of one of the arms swill iirst be brought against the inclined side of one of theprojections on the nut N, and will turn the latter in the direction ofits arrow, (Egadi) until'the l straight edge ot' the next projection isvbrought against the arm, as shown in fig. 5. The cutting-edgeof the`drill, fitting in the incision made by it in the rock, prevents the rodD from turning with thenut. As soon as the nut ceases to turn, it willbe elevated with the rod D, untilthe arm s passes from contact with thenut, when the rod, bythe action of the spring and its own weight, willdescend, the edge of the drill being brought smartly against andpenetrating the rock. While the drill is being elevated, the curvedportion of the arms s passes in contact with and bears against the sideof one of' the projections t', and thus causes the nuttobe turned, therod (which is now removed from contact with the rock) turning with thenut, so that when the rod descends, the drill will strikev a differentpart of the rock from that {irst cut, the extent to which the drill isturned in its upward motion depending upon 'the curvature of the arm s.The Contact ot' the spring` 7c with the rod is prevented by the tube 4Z,the l'lange w at the lower end of which also prevents the contact of thenut N and spring, so that the action of the lattcrvin recovering itsposition will not turn back thenut as the rod descends. The revolutionof the nut while the drill is in contact with the roel. serves to carrythe nut upwards en the rod, so that, as the operation oi' the machinecontinues, and as the drill sinks deeper in the rock, the iiut'will bemaintained in the same relative position to the shaft L and its arms.hen 'the rock is soft and the drill penetrates deeply at nach stroke, itis necessary, in order for the nut to be elevated to the requiredextent, that it should turn freely; when, however, the rock is hard, andthe drill descends but slightly at each stroke, the motion ofthe nutshould ne limited, in order that it may not be moved upwards out ofreach ofthe arms s. The extent of the motion of the nut N at each strokeof the drill maybe readily regulated by adjusting the disks fj" to orfrom each other,l as when `the disks are brought close together againstthe rubber washer, the latter will cause theml to bear with such forceagainst the screw-threads, that when the nut is turned the rod will becarried round with the same, the extent of the motion ofthe rod beinglimited by the amount of pressure on the disks and the force with whichthe drill 'bears on the rock. It will, therefore, be apparent that asthe disks are brought closer together, the friction upon the rod isincreased, and the extent to which the nut is- Lurned independently ofthe rod, and the extent of its .elevation on the latter at each strokeof the drill, are decreased. lWhen the drill is to be raised, the shaftL is removed from the openings o, and is placed in the openings o', sothat its arms cannot strike the nut N, the set-sorew 3 ,is turned, sothat its point is introduced into the slot e in the rod, (which'is thusprevented from revolving) and the nut N is lowered until it rests on thebar t, and the teeth or projections t' engage with the teeth of thewheel X. A rotary motion is now imparted lo A.the shaft I, so that thenut N is caused to rotate in the direction of its arrow, (tig. 1,) whenthe rod D will be quickly elevated. As the water passes from the pipe Einto the bore, it converts the drillings into a semifluid mass, which isthrown out from the bore by the action ofthe drill itself. When theweight ofthe machine is not sudeient to impart the necessary stability,weights may be placed upon the platform A, and by adjusting the legs B,frame C, and bars a2, the machine may be brought to the positionrequired to drill a hole at any desired angle. By adjusting the plate b,the spring k may be compressed or relcaserhso as to increase or diminishtheforcc of the blow.

Without confining myself to the precise construction and arrangement ofparts herein described, Iclnim as my invention, and desire to securebyIietters Patenty 1. The drill-rod D, nut N, and spring Ir, bearing onthe nut, in combination with the within-described devices, or theirequivalents, for first turning the nut on the drill-rod, and thenelevating and turning both together, the whclebeing constructed andoperating substantially as and for the purpose specified.

2. The drill-rod D, nut N, with its projections z', in combination with`the shaft L and its peculiarly-bent arms s s, the whole being-.arrangedand operating substantially as and for the purpose described.

3. The tube d, arranged in respect to the rod D and nut N, substantiallyas and for the purpose set forth.

4. The nut N, consisting of two adjustable disks, ff', an interveningelastic washer, e, and set-screw 8, or its equivalent. v

5. The adjustable plate Z, 'or its equivalent, in combination with thespring c, for the purpose described.A

6. The combination of the frame C, platform A, legs B, and bars a2, thewhole being constructed and arranged for adjustment, substantially asset forth.

7. The groove e in the rod D, and set-screw 3, combined and operatingsubstantially as set forth.

In testimony whereot` I have signed my name to this specification in thepresence of two subscribing witnesses.

WILLIAM WEAVER.

Witnesses:

CHARLES E. FOSTER, JOHN WHITE.

